Reference no: EM133073761
Worksheet: Viruses
Read "Mystery of 1918 Pandemic Flu Virus Solved by UA Researchers"
1) How many people were killed by the 1918 flu virus?
2) What is a "molecular clock"? _________________________________________
3) What caused the extensive deaths in people ages 20 to 40 that were infected by the pandemic virus ? ____________________________
4) Explain in your own words why people born between about 1880 to 1900 had a high mortality rate when they were exposed to the 1918 flu virus.
5) Which two highly pathogenic avian-origin viruses are commonly known as the "bird flu"? __________________
6) Which disease in the 1870s crippled the economy?
7) Instead of wild birds being the major reservoir of flu virus, where do these researchers think that most cases of flu start ?
Read the article "The mother of all flu pandemics"
8) What is the biggest threat to a flu virus? ______________________________
9) How often do flu pandemics occur? __________________________________
10) What is the function of neuraminidase in the flu virus?
11) How many people were killed by Russian flu? ____________________________
12) What were two problems that raised the death rate of the 1918 Spanish flu?
13) What was a difference between the 1957 Asian flu and the 1968 Hong Kong flu?
Read "Poliomyelitis: The last childhood plague"
14) Why did epidemics of polio occur when human waste was separated from drinking water?
15) How does polio enter the body? ___________________________________
16) How does isolation help the patient? _______________________________
17) Which virus did Salk work with first? _____________________________
18) How many people were killed by Spanish influenza? __________________
Click on "Page 2" etc
19) What were the results of the large scale studies of the vaccine in 1954?
20) What was the problem in 1957, when the vaccine was widely available?
Read "AIDS retrospective"
21) Which animal was the original source of HIV in West Africa?
22) When was the first test licensed? ____________________________
23) How much did the drug AZT (the first drug to treat AIDS) cost in 1987?
24) Which play about AIDS won the Pulitzer Prize? __________________________
25) In 2001-2002 what percentage of sub-Saharan Africans with HIV received anti-HIV medication? _______________________
26) In 2009 - 2010 what percentage of new infections in the US are in heterosexuals?
27) Give two other pieces of new information you have gained from reading this article:
Read "HIV hides from drugs for years"
28) How many patients were followed in this study, and for how long?
29) What percentage of patients still had HIV in their blood?
30) Is there a risk that these patients could infect others?
31) Which cells does the HIV hide in?
32) Why is it important for new drugs against HIV to be developed?
33) How many people in East and Southern Africa were living with HIV/AIDS?
34) What percentage of adults in Africa are on antiretroviral treatment?
35) Click on "Lesotho" What was the adult HIV Prevalence?
36) How has Botswana made great progress in reducing HIV?
37) How many new HIV infections were there in South Africa in 2019?
38) Discuss what you think could be done to reduce the infection rate in future:
Attachment:- virus.rar